{"product_id":"radiomaster-er3-pro-pwm-dual-band-gemini-gemini-x-receiver","title":"RadioMaster ER3 PRO PWM Dual-band Gemini \u0026 Gemini-X Receiver","description":"\u003cp\u003eThe ER3 PRO is a compact receiver designed for installations where space is limited but link reliability and system access remain important. Despite its small footprint, it retains a full-featured RF and telemetry interface, making it well suited for clean, space-constrained builds.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_1_257ed0b4-08e5-4eaa-8020-468b255b674c.jpg?v=1789020923\" width=\"1024\" height=\"575\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eExpressLRS Performance: Low latency, high reliability, and excellent link quality with flexible configuration options.\u003c\/li\u003e\n\u003cli\u003eDual-Band Gemini X (2.4GHz + Sub-G 900MHz): Utilizes both frequency bands to provide enhanced link reliability across a wide range of operating environments.\u003cbr\u003eUp to 100mW Telemetry Output: Increased telemetry output power for improved data reliability and range.\u003c\/li\u003e\n\u003cli\u003e3 PWM Outputs + Serial Support: Compact PWM output with CRSF and SBUS options.\u003c\/li\u003e\n\u003cli\u003eExternal UART Port (Locking Connector): Dedicated interface for telemetry, external devices, and system expansion.\u003c\/li\u003e\n\u003cli\u003eIndependent Multi-Source Voltage Telemetry: Monitor up to two power sources simultaneously using dedicated ADC channels: EXT-V (up to 70V), receiver supply voltage (V-PWM) (up to 12V).\u003c\/li\u003e\n\u003cli\u003eMMCX Antenna Connectors: Durable, replaceable antennas with a secure connection.\u003c\/li\u003e\n\u003cli\u003eWi-Fi Updates \u0026amp; WebUI: Configure and update directly without disassembly.\u003c\/li\u003e\n\u003cli\u003eDurable Injection-Molded Housing: Compact, protective enclosure for long-term reliability.\u003c\/li\u003e\n\u003cli\u003eApplication: A compact, full-featured receiver for models that require advanced RF performance, telemetry, and connectivity in a space-efficient package.\u003c\/li\u003e\n\u003cli\u003eCompatibility: Compatible with all ExpressLRS transmitters and modules, including radios with built-in ELRS. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAt its core is the ExpressLRS system, built around dual Semtech LR1121 transceivers and a dual-band Gemini X RF architecture operating on both 2.4 GHz and Sub-G 900 MHz. Combined with up to 100mW telemetry output power, it provides a stable control link and enhanced telemetry performance for applications where reliable telemetry data is important.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_2_e15bb881-3bc1-45ca-a618-8d120bd4d316.jpg?v=1789020923\" width=\"1024\" height=\"575\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_3_41a4c6e4-a199-4685-ac87-e14e20acc5cb.jpg?v=1789020922\" width=\"1024\" height=\"575\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_4_45bef269-b2de-41c1-9137-2808f4164b95.jpg?v=1789020923\" width=\"1024\" height=\"575\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eWith 3 PWM outputs, serial protocol support, and dual independent voltage telemetry channels, the ER3 PRO integrates easily into a wide range of aircraft and vehicle platforms. Dedicated ADC channels independently monitor receiver supply voltage (V-PWM) (up to 12V) and EXT-V (up to 70V), providing accurate telemetry for each voltage source. Locking connectors on the UART and EXT-V telemetry ports help ensure secure, reliable connections in demanding operating environments.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_5_bfbd82a6-a07a-4cc8-9325-8709c592b858.jpg?v=1789020923\" width=\"1024\" height=\"575\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_6_7fa0c837-8fd5-41f2-800e-dff7dcd1a4a2.jpg?v=1789020923\" width=\"1024\" height=\"575\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_7_fb3444d8-81b1-4b4e-8c38-d52cb01efcbf.jpg?v=1789020923\" width=\"1024\" height=\"575\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eServiceability is built in. Robust MMCX antenna connectors provide secure attachment and easy replacement, while the durable injection-molded housing delivers long-term protection in a compact form factor.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_8_99630dde-6c03-414a-bbdc-0bc15316addb.jpg?v=1789020923\" width=\"1024\" height=\"575\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_9_ba839db0-1735-4055-8b38-d179dfc1a11e.jpg?v=1789020923\" width=\"1024\" height=\"575\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eImportant\u003c\/h3\u003e\n\u003cp\u003eEXT-V Telemetry Input:\u003c\/p\u003e\n\u003cp\u003eThe maximum input voltage for the EXT-V external voltage telemetry reading is 70V. Do not exceed 70V, as this may damage the receiver.\u003cbr\u003eThe EXT-V input is accessed through the 2-pin JST-GH connector. Connect the red wire to the positive (+) terminal of the battery or ESC. The ER3 PRO provides independent ADC channels for EXT-V and receiver supply voltage (V-PWM).\u003c\/p\u003e\n\u003cp\u003eServo Power:\u003c\/p\u003e\n\u003cp\u003eEnsure the ESC’s BEC can provide sufficient current for the servos being used. For high-voltage, high-torque servos, a 2S 7.4V battery or a suitable high-current UBEC is recommended.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eItem: ER3 PRO PWM - Dual-Band GEMINI and GEMINI-X Receiver\u003c\/li\u003e\n\u003cli\u003eInput Voltage: DC 5.0 – 12.0V\u003c\/li\u003e\n\u003cli\u003eWireless Protocol: ExpressLRS\u003c\/li\u003e\n\u003cli\u003eOutput Channels: 3CH PWM\u003c\/li\u003e\n\u003cli\u003eSerial Output: CRSF \/ SBUS\u003c\/li\u003e\n\u003cli\u003eTelemetry Power: Up to 100mW (adjustable via LUA)\u003c\/li\u003e\n\u003cli\u003eVoltage Detection Range (EXT-V): DC 4.0 – 70V\u003c\/li\u003e\n\u003cli\u003eBus Interface: CRSF\u003c\/li\u003e\n\u003cli\u003eAntenna: 25 cm high-sensitivity, MMCX connector\u003c\/li\u003e\n\u003cli\u003eWeight: 13.5 g (without antenna)\u003c\/li\u003e\n\u003cli\u003eDimensions: 49.2 × 26.8 × 13.0 mm\u003c\/li\u003e\n\u003cli\u003eFirmware Target: RadioMaster Dual 2.4GHz\/900MHz Receiver\u003c\/li\u003e\n\u003cli\u003eDevice Name: ER3Pro Dual Band True Diversity + 3×PWM RX\u003c\/li\u003e\n\u003cli\u003eELRS FW Version: Requires version 4.1.0 or Higher\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIncludes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 * ER3PRO PWM - Dual-Band GEMINI and GEMINI-X Receiver\u003c\/li\u003e\n\u003cli\u003e2 * 2.4GHz Antennas\u003c\/li\u003e\n\u003cli\u003e2 * Dual-Band Antennas\u003c\/li\u003e\n\u003cli\u003e1 * Voltage Telemetry Cable (Type-B)\u003c\/li\u003e\n\u003cli\u003e1 * CRSF Cable\u003c\/li\u003e\n\u003cli\u003e1 * ELRS RX SBUS Cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBrowse More\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrowse All \u003ca href=\"https:\/\/www.phaserfpv.com.au\/collections\/radio-gear\/FRSKY+Receiver\"\u003eRadiomaster Receivers\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eBrowse All \u003ca href=\"https:\/\/www.phaserfpv.com.au\/collections\/receivers\"\u003eReceivers\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eBrowse All \u003ca href=\"https:\/\/www.phaserfpv.com.au\/collections\/radiomaster\"\u003eRadiomaster\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RadioMaster","offers":[{"title":"Default Title","offer_id":47777066844331,"sku":"35865","price":74.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1477\/4314\/files\/RM0157-0140-1.png?v=1789038670","url":"https:\/\/phaserfpv.com.au\/products\/radiomaster-er3-pro-pwm-dual-band-gemini-gemini-x-receiver","provider":"Phaser FPV","version":"1.0","type":"link"}